Dynamic rheological behavior and mechanical properties of PVC/CPE/MAP–POSS nanocomposites

Abstract

Poly(vinyl chloride)/chlorinated polyethylene (PVC/CPE)/methylacryloylpropyl-containing polyhedral oligomeric silsesquioxane (MAP-POSS) nanocomposites are prepared. The plastic behavior and dynamic rheological behavior of PVC/CPE/ MAP-POSS are investigated. The influences of composition on dynamic storage modulus G 0 , loss modulus G 00 , and complex viscosity g* of PVC/CPE/MAP-POSS melts are discussed. The dynamic mechanical properties, mechanical properties, and morphology are determined. The results show that both plastic time and balance torque of the nanocomposites decrease, but the G 0 , G 00 , and g* all increase with increasing MAP-POSS content. The maximum value of the dynamic mechanical loss tan d decreases and elasticity increases when MAP-POSS is added. The impact strength of the nanocomposites increases with increasing MAP-POSS content and has the best value at 10% content of MAP-POSS, which is 5.38 kJ/m 2 higher than that of the blend without MAP-POSS. The MAP-POSS can be used as an efficient process aid and impact aid for the PVC/CPE blend.

Review of Recent Developments of Glass Transition in PVC Nanocomposites

“…In many cases, it has been found that the use of polyhedral oligomeric silsesquioxanes (POSS) as nanofillers, irrespective of the functional groups (POSS) [14,15,[91][92][93][94][95][96] attached to the POSS cage, leads to the plasticizing effect of PVC, i.e., to a lowering of Tg. The influence of 10, 15, and 20 wt.% methacryl polyhedral oligomeric silsesquioxanes (POSS) on the Tg of PVC was described by Soong et al [91], who observed a monotonous decrease in the α-transition temperature and related changes in mechanical properties (lowering of storage modulus) as a clear indication of the plasticizing role of POSS on the PVC matrix.…”

Poly(ethylene glycol)–polyhedral oligomeric silsesquioxane as a novel plasticizer and thermal stabilizer for poly(vinyl chloride) nanocomposites

“…For the purpose of combining plasticization with thermostability in one chemical compound, blending of PVC with POSS would provide a prospective way to achieve the desired properties of two materials. A variety of POSS nanostructured chemicals have been prepared which contain one or more different organofunctional derivatives, and have been introduced into PVC nanocomposites with the purpose of plasticization, i.e. lowing the T g value, or enhancing the impact strength, or promoting the thermal properties of PVC .…”

“…A variety of POSS nanostructured chemicals have been prepared which contain one or more different organofunctional derivatives, and have been introduced into PVC nanocomposites with the purpose of plasticization, i.e. lowing the T g value, or enhancing the impact strength, or promoting the thermal properties of PVC . Nevertheless, the plasticization and thermostability effects of POSS derivatives on PVC, especially the influence of interaction between POSS derivatives and PVC on these two effects, are not taken into account as a whole.…”

Polyhedral oligomeric silsesquioxane/silica/polydimethylsiloxane rubber composites with enhanced mechanical and thermal properties

“…Known as the smallest possible silica particles, polyhedral oligomeric silsesquioxane (POSS) has been attracting a great deal of attention during the past decades. Owing to the surrounding organic groups, POSS is compatible with most polymers, such as polyethylene, epoxy, polyurethane, chlorinated polyethylene, polyamide, and polystyrene. However, the morphology of POSS in polymer matrix, which is responsible for the modification effect, intensively depends on the incorporation method of POSS.…”